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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4c124ba9aa81dfd8964000023a28cd8cdf06a8b9352369528ebf8282837ccab' 
  AND token = 'ArP48JtrV1FH6SVrehHuN6l4gNPvSgON6AM8BIsbNcc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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