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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc06b07df34fbf565ac9649750d8f5b7c4864240a3b6632bb94fedea53820c43' 
  AND token = '5DtfpsPsx92MzoWOVFaW7Qz02L/hYawquvMIf0Y9uhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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