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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0baefc46f241ae3e3aec536f2b1054a2e1144c41802f1c54e11dd22080b7e8e5' 
  AND token = 'HCJABBOFnG7TALBafWnGORZvtNNvxyR5kPCyxbbggXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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