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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64a013568b4a862e866a1157577eaa90d8ab1c90da4cdb7b7dbea0b5a533dd4c' 
  AND token = '6ayQ0SHJdmkCw8g/706ZUcEBj045F2HLhl9l3niGeHU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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