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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e845f2eae7d4328a5813747e82be708617bf2843da797c0cd4a228791f0d4ce9' 
  AND token = 'STPTxRqloDeT1+vj4Pq7bBsTALA8jBs1u2U2M5i842Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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