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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '205f3c214e74d8509e0d6a58ed7bfd7c0cdef7cd6411db5fe2b54e45e19c9fbf' 
  AND token = 'zQPh6Krg5p6DgsgO9TJD8icD4CZPWTr6oY8zEGIHAcA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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