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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e1ae63ff98180c5e4da2eb59169cf728f022d12fb7d2f3b768eb227c5ef8585' 
  AND token = 'Qv3qCDzplF9VcNkSyvbGcaK5f4rIEd7iWHX5gjFEFLU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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