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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '486ca6ac80a231987adb98fadf329981ef4f9d83fcbd7a379ca24199eb3eef14' 
  AND token = 'L+r0qgpkjQKoD8qgRz3/O8OyLk6v8AAetauFGk1olpg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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