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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9a837b9bfa5b330f2a39147c66e46c25e2c003729abf2d6567c18b77e2ccbe9' 
  AND token = 'LwsgrHCM4ezaqamfkKzrecFZdcnU2h4YBZps6Y5z5Ws=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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