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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '93e1d09b8acc38abff9d13925c5ac81526d9aabf0a7f277ff0e3c461c8f8e39f' 
  AND token = 'PC1Rca+YGxkktYSXq8McSWPEv4miaEEnRn6vblmhSJE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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