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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1db440d0cd97c6f62e92ba9f99109fb5ee3c3e86f80ebc3b80afa538a1dbe60a' 
  AND token = 'F1k8LBgVE+PPMjY0qe+BzLpSOX+A2YoyPVdp7+d14BI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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