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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fcb8614702ae16d8eb406eb59d88e0a8a01c1d898027d1150d7bda9560ab82bb' 
  AND token = '0DoPB6boqt741KhfkH3zvma4jfEcgKXWk+bVO8svtw8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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