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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f328632830b7aec133d0b2e7835b88f6331677b941ad2861a22706018f97d29' 
  AND token = 'by6N5t8z4inJzVWz3jOG8NOzoKmk1YT8ONhfV+A+tiI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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