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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1abace61544314c3cdb42a24909b84b997f1e367262eb580199a97518ee66432' 
  AND token = 'c7UQcP2szDU2dsg7h5rvLHvpKSr4+yxezqLlM9a1o8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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