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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10f26fbe66a6920aec915f6f422e15484625b747b6f58be12d59da0ac7e14929' 
  AND token = '8vDKhr4h9nzlrOtGhzKsiNQiBeE6EMVBxTFa5UZ5bjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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