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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9618a4bcdbd8767a273a0179ad09f948803b972dc5a12fe617d49bef78b6f80' 
  AND token = 'pArOwuXJdcdf68TIHWi0MAFr8HFAnEy6oUR69Jncefo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00276

JSON explain

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