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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'c80390e634f6152590e22e955c9491c47c335adba24caf6fdcb4bd91216f4abe' 
  AND token = 'bP2zHepQ1RpK8kfATi3t42zWGd7gkzdp561yvMESGwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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