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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd0ae3cc75ba83b4683528e76257e2c45a38b591a5b8c99abc799297c0bd85e4b' 
  AND token = 'x0nEJtbNeCEPqqkMaQnkc4GJr93vW/0OqYWEmiMIJ0I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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