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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f130e7bc18fa40ab008774459e1bc01c69752b5c0f19645843434cd536cefe4' 
  AND token = 'a7xblQDmfiiwjhQYFBhtqV1jS5sSQ3lO1zJZGWdCae8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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