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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89a749b329e8149259685d418e6e3a8fe05a410c52599c5b8f2155e9be0d9ae5' 
  AND token = 'BLNRpzSPrbZA3BS+D/FQxiVnJl8JPQpJnPfNCZMCZTU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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