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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '7d4dae52d1d05ce8fbfbad69d741924eb12a8425cc7cc907c5c3056274a9a25a' 
  AND token = 'NT+A/XR11S9hM2TxMp6ktIJJhy1q7+u7WncyqqMdUow=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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