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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeae201d1fc4db5526589714dc19c3c5b911b8167bb1cdc43ff9d351c32d2fbe' 
  AND token = '3kyxYN9SBKS1kxmZX2a6dmBQCUT9U/8F7Pk9umIR380=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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