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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '899f9664619c1b77e2ab1e6a196626c6794ef59a789acdbe76b74224af9c798b' 
  AND token = 'Yo88mL3Q8Aazt3dpoN3rxar/XcOSQ/KRN124Q53J3oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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