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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '370bbeb786082edc6434ae5872de0cd773695277705a6c5accd01425414f02a2' 
  AND token = '3o/xohg1WvHNCbbL0s7J3nxrTmpsRR+nZhHC9fTWW5E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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