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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee13ea746c21adab37b5cec8da0b91ed8345e22c9ba70de3f05e5cd1b52714a7' 
  AND token = 'viVeUyyvLJWDS5foGWhmoFEiNmdrUP7fhv0U/eVmpUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}