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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '30f2d4442791f60157346f3294b9424b259bf2b383ea5b6d2d52f64b427db380' 
  AND token = 'FkOmieGgMjQQsmpbGKkVIWLUNV4r1q0Fl9+aeWWkaUw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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