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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3fa37efe5fbf252b369d9091de7d0ff329db9937ef1c482ee31831387d016033' 
  AND token = 'R3To6qJyP6+yN2Mhl19mvunxLd0mE9LnoRu15m3BwKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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