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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4b01d2ba4e57826f2c0dd3e66885b68c7e084e3838a3e203413e9e2174cdae2e' 
  AND token = 'js/l2Ej4RHQMhEaNqU+VutCqFdLWVaJMF75XbfZi2Q4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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