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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c714d00be360a7224a1c5b462af8a3531768f2d63afaaff28978952ac9330ed4' 
  AND token = '8cAZN3r43ck2bgxKGv+j6IWAYOfIGHKxFqZ2mWXIQ3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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