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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd5779ecec47c0968dea384bcd1c087369940cf68abcf9dbe0a510d030ab734a7' 
  AND token = '7qDwWqqKfje1j1XgU9VMXWYaGPdL7uXrfCFk8LCuakA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}