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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07c65f9e9120cae2598043f0362dfe6cd10aaa90c675d890e5bc2b22eee06b8c' 
  AND token = '6eGB4iro9ymsNv4D77nrNU8dDLRSRicTA1lR5c21Fd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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