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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62da148eb101d94c35aa197062199a2ebefcd616b574383ea016c739460edf7e' 
  AND token = 'Fcarrr8d0ZybVXMWDY5zJdMvr08/WCbAEoILZ2S76WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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