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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '269f2e1b069d5cd0be30bc581afd9b948cd46606c54df4e469d1b0783716bc15' 
  AND token = 'HhTVSLGCoXzLG4xl1bddPZB5M7Ob7BTfU7xGcDy+Jrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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