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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0114956b03fdca8fa11df6fa77cede7d462dc3aa6a4c5bd0c84b0f3d1d3c56b8' 
  AND token = 'C6UzYcki2lyX1Vjt6ooEv4Djy1PAulavrhmNyV31FTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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