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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ada22201b4744dcd7e8cfa8905628f44939544027b42168a0cf754ab78bdc472' 
  AND token = 'oDQ2ApynmBil2mUbJwUy5SX7Yrp9r2ZZGaAKXW/1gNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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