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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '706769f7f980c80ab0050bbe99f2befd0b9e482a38ae675134052164e8c3e3ad' 
  AND token = 'RczcDGZ1vJFdOsvE6RAnojGkEMRC5uGdZN10XG9FFsA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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