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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38c7cdce33e1c75eeecd77b9450565eccf56659f7859b90b559c61ea8d0a4535' 
  AND token = 'oORonGae0i7GzRPdUY2fnBXEKp6Q3MRe4BG2cbwHBB8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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