SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4b83371d17d6cd74c80dd4a6cd14d3e567b8c191f2079299b1a68e8595454697' 
  AND token = 'gWzp09Xn7VfVQGmCCm5GevYIRr1xtDM5GHs+cjWlDPE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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