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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '885a57b8a8b9aff4e230fbb59f187faedc9e8f5cedaf20a321ce710205dccb37' 
  AND token = 'RWALdd+tITUWHAACyZn9X34AyWV31rmXbGlcNO9VFRI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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