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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '22ed17bd4a6f9ab4d46f4ba07c729545b3a7fec7fc3d2b2fcb8b884d3c8dd6b5' 
  AND token = 'ta95OL+Zu4twRgx780/MZAfXLTcpPWh2NYeVcpG9vRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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