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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92e12778dab755a2b0f091919cd374f4976f665d5ae3203152c1bfac9f78fae1' 
  AND token = 'ADe0NRm0KGYneuESB9n6WUcRvGz1yc3mY2OeZqTa4Uk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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