Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fe7d4bd7d061bf76d1dfee5ed97c3ff5ef0b0cc5f21a296429410a15ca871082' 
  AND token = 'A9im5xEsDgn2E6sPl2EnOEMc54a8RwW3afibLcToEjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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