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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40eafa2fb3a4a2e8bcc23cc1a0eaba97b49c2c7f694a1578f4e3ad01e0c20118' 
  AND token = 'cRwivWgODl59iSpEw62smTkhS+d+rJfPBg/cTr2iq1g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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