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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f062e47cbe18634df85af5b9d0a3f2ae36b54e233b1576f7ca17eb318eeda24c' 
  AND token = 'b3Gv77jPQRoqsvhkdpgwqtpK3OHfj4Bpw2y404Et2jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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