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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a01fb0b51480f72238c35d9180ca90c5746ca0961501f4c48f30c537706bc09' 
  AND token = '6u+wN5E1Y3lTFJywGHXLp2jjQifyQ1rw0Hcyg4JE5XI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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