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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '25075e55224cc0d6529ac3ffbe66129086c18e0a0802b25b23f99c96debbf321' 
  AND token = '/Tyv90XQKucbt4LbyqIcTcJBdLq98NzL+OuUP2n33J0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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