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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7919721eb4e36031318ef2aa5e1ee64df2ac36ab83b18b421c2439ebb9dd62ee' 
  AND token = 'TH4JTS4pLq++WOGEeV14yy1f1MErVv5PYQysKIPK+Gs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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