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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'da2c910b877ef57ebb96670274a89376d60b031d73f5ae7761a12e01d6d531e4' 
  AND token = 'c1fDKVx+H5vEBW9Ja8Rq/+G9bE30n9s7IP38iKhVbcQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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