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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd1a793457ab6b2e688ea1d1beb4ce249a196676a96167d07787d7ef18f36694b' 
  AND token = 'ynylgzcKHOCVj0tSY2CSKJThk8ezwlA2LUs9hN86nhI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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