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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aaf1c435f8e751bf1bc652f991c5537a03e22c386790cd542f2439a11cc77243' 
  AND token = 'mOTmkoJKcRcCJFCrrVv1e1r1jQVOuh41EoUF3UdBjBU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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