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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00eda17847c6e7dc4bbd58a25ff9ab36880ea9829b172c77ab6249e3023bf4cf' 
  AND token = 'JUeJ8Kvxkg1srgR0xjnUbJuBIxxJbfObhZGGaY7oO2s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

JSON explain

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