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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40be083e43e59507065b38f9b0f4f30874c012dfe74b5285d00e9cd2adbe3ce5' 
  AND token = 'RWGO+E+i0GOP59fJ1aPVNDa22Bj/WJ09OrUgnocf4aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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