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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1acf27fd778f0790dcc89ecdaaf8b5d1677de419d1e706220190c5183a6eb88' 
  AND token = 'RFA+W8P6rykeHSULsEJ33a13Ur5LMTjcSS6V/0kodOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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