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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee07dd20169750f1da32ecf1e922b21c92c572f3f19dd005858059e81698d1a9' 
  AND token = 'py6anHsahag2EtFOfO30vTCftbd3eIxN1biFav1qbz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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